2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93283I propose a quantum trajectories approach to parametric identification of the effective Hamiltonian for a Markovian open quantum system, and discuss an application motivated by recent experiments in cavity quantum electrodynamics. This example illustrates a strategy for quantum parameter estimation that efficiently utilizes the information carried by correlations between measurements distributed in time.Formatted with RevTex, 4 pages plus 4 EPS figures. To appear in Quantum and Semiclassical Optics (JEOS B)Quantum Physicstext